GLOSSARY
PerkinElmer Life and Analytical Sciences 189
Chapter 11
Glossary
2S%
This value represents the percent of uncertainty in a gross count value.
Acquisition Time
This is the amount of time a sample has been counting.
Automatic Efficiency Correction (AEC)
This is a method used to adjust counting region settings to compensate for the
effect of quenching on a sample spectrum.
Background Radiation
This is environmental radiation such as cosmic rays from space, and the
radionuclides present in metals, glasses, ceramics and concrete.
Becquerel (Bq)
The Becquerel is the International System of Units basic unit of radioactivity.
One Becquerel=One Disintegration Per Second
One Curie=3.7x10
10
Becquerels
The calculation for Bq is (DPM for nuclide 1, 2, or 3)/(60DPM/Bq).
For uCi = DPM(nuclide 1, 2, or 3) / (2.22* e6 DPM/ uCi);
For pCi = DPM(nuclide 1, 2, or 3) /(2.22DPM/pCi)
Block Data Items
Block data items, which are comprised of several data items are used for the
purpose of defining reports. The most common usage for Block Data items is in
printing reports. By selecting certain Block Data items, the instrument is able to
create reports that include instrument, protocol, spectrum or performance (IPA)
information.
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